fw_config.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootstate.h>
#include <console/console.h>
#include <fw_config.h>
#include <gpio.h>
 
static const struct pad_config dmic_enable_pads[] = {
        PAD_CFG_NF(GPP_R4, NONE, DEEP, NF3),    /* DMIC_CLK0 */
        PAD_CFG_NF(GPP_R5, NONE, DEEP, NF3),    /* DMIC_DATA0 */
 
};
 
static const struct pad_config dmic_disable_pads[] = {
        PAD_NC(GPP_R4, NONE),
        PAD_NC(GPP_R5, NONE),
};
 
static const struct pad_config i2s_enable_pads[] = {
        PAD_CFG_NF(GPP_R0, NONE, DEEP, NF2),    /* I2S_HP_SCLK */
        PAD_CFG_NF(GPP_R1, NONE, DEEP, NF2),    /* I2S_HP_SFRM */
        PAD_CFG_NF(GPP_R2, DN_20K, DEEP, NF2),  /* I2S_PCH_TX_HP_RX_STRAP */
        PAD_CFG_NF(GPP_R3, NONE, DEEP, NF2),    /* I2S_PCH_RX_HP_TX */
        PAD_CFG_NF(GPP_S0, NONE, DEEP, NF4),    /* I2S_SPKR_SCLK */
        PAD_CFG_NF(GPP_S1, NONE, DEEP, NF4),    /* I2S_SPKR_SFRM */
        PAD_CFG_NF(GPP_S2, NONE, DEEP, NF4),    /* I2S_PCH_TX_SPKR_RX */
        PAD_CFG_NF(GPP_S3, NONE, DEEP, NF4),    /* I2S_PCH_RX_SPKR_TX */
};
 
static const struct pad_config i2s_disable_pads[] = {
        PAD_NC(GPP_R0, NONE),
        PAD_NC(GPP_R1, NONE),
        PAD_NC(GPP_R2, NONE),
        PAD_NC(GPP_R3, NONE),
        PAD_NC(GPP_S0, NONE),
        PAD_NC(GPP_S1, NONE),
        PAD_NC(GPP_S2, NONE),
        PAD_NC(GPP_S3, NONE),
};
 
static void fw_config_handle(void *unused)
{
        if (!fw_config_is_provisioned() || fw_config_probe(FW_CONFIG(AUDIO, AUDIO_UNKNOWN))) {
                printk(BIOS_INFO, "Disable audio related GPIO pins.\n");
                gpio_configure_pads(i2s_disable_pads, ARRAY_SIZE(i2s_disable_pads));
                gpio_configure_pads(dmic_disable_pads, ARRAY_SIZE(dmic_disable_pads));
                return;
        }
 
        if (fw_config_probe(FW_CONFIG(AUDIO, MAX98360_ALC5682I_I2S)) ||
                fw_config_probe(FW_CONFIG(AUDIO, MAX98360_ALC5682IVS_I2S))) {
                printk(BIOS_INFO, "Configure audio over I2S with MAX98390 ALC5682I.\n");
                gpio_configure_pads(dmic_enable_pads, ARRAY_SIZE(dmic_enable_pads));
                gpio_configure_pads(i2s_enable_pads, ARRAY_SIZE(i2s_enable_pads));
        }
}
BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_ENTRY, fw_config_handle, NULL);